Sheet metal pipe blanks



4 sheets-sheet 1.

(No Model.)

l D.H.IST0LL. MACHINE PORTORMING SHEET METAL lPIPE BLANKS.

No.- 543,971.l Patnted Aug. 6, 1895.

www; m J. m m v TM f/W n, |II. Q S Il .b [wia & MJE .w I .l M Il =.h..n=Il qw @w .M M H -Pn Y 4 Sheets-Sheet 2.

(No Model.)

D.v H. STOLL. MACHINE EOE EGEMING SHEET METAL PIPE BLANES.

Patented Aug. 6., 1895.

(No Model.) 4 Sheets-Sheet 3.

D. H. STOLL. FORMING SHEET METAL PIPE BLANKS.

MACHINE FOR (No Model.) 4 Sheets-Sheet 4. 4D.H.ST0LL.

MACHINE FOB. PORMING SHEET METAL PIPE BLANKS.

No. 543,971. Patented Aug. 6, 1895.

Il 1 l il I ,I im f I nventor.

ALL-orney.

W itnesses:

STATES PATErVr OFFICE.

DANIEL H. STOLL, BUFFALO, NEW YORK, ASSIGNOR OF ONE-HALF TO MICHAELNEWELL, OF SAME PLACE.

MACHINE FOR `I-'OJRlVIINCi SHEET-METAL PIPE-BLANKS.

SPECIFICATION forming part of Letters Patent NO. 543,971, dated August6, 1895. Application'filed September 5, 1894. Serial No. 522,205. (Nomodel.)

Y ures of reference marked thereon, which form a part of thisspecification.

My invention relates particularly to improved machinery for formingsheet-metal conductor pipe-blanks.

The object of my invention is to provide special mechanism for bendingastrip of sheet metal into cylindrical form, both of its longitudinaledges having been previously turned over.

To that end my invention consists, essentially, of a revoluble notchedmandrel, around which the sheet-metal strip is shaped,spring guides fordirecting the turned-over edge of the sheet-metal strip into engagementwith the notched mandrel, a reciprocating former for holding the sheetmetal against the mandrel during its revolution and for releasing thesame for removal, and means for revolving the mandrel and reciprocatingthe former to shape the sheet-metal strip in forming the pipe.

Myinvention further consists in certain details of construction, all ofwhich will be more particularly hereinafter described,and pointed out inthe claims.

In the drawings, Figure l is a front elevation. Fig. 2 isarearelevation. Fig. 3isatop planview. Fig.4isaright-handendelevation, andFig. 5 is a left-hand end elevation, of my improved machine. Fig. 6 is atransverse vertical sect-i011 of Fig. l, taken in the line x Fig. 7 is adetached top plan view of the clutch, cam, and connected operativemechanism. Fig. 8 is an enlarged vertical section of the notched mandreland former with the sheet-metal strip in position to be shaped, and'Fig.9 is a similar section after the shaping operation is completed. Fig. 10is a central vertical section through the right-hand end of Fig. 3 inthe line y y, and Fig. 11 is a detached side elevation of the cam.

Referring to the drawings, 1 1 are the standards, and 2 the body, of theframe upon which the operative parts are mounted.

3 is an oblong open bracket extending out from the standard 1 on theright-hand end of the frame. In the outer end of this bracket isjournaled the short shaft 4. Upon the outer end of this shaft 4 isrigidly mounted the power-pulley 5 and upon the inner end is looselymounted the bevel-gear 6. 7 is feathered upon the shaft 4 and adapted,when engaged with the bevel-gear 6, to impart rotary motion to the same.This clutch is thrown into engagement by the hand-lever 8, its lowerendh'aving pivoted to it one end of the connecting-rod 9, the other endof which being pivoted to the short lever 10, which forces the clutch 7toward the bevel-gear 6. A vertical frame 11 is dovetailedinto thestandard 1 and is adjusted therein vertically by the screw 12 andattached hand-Wheel 13. This frame 1l carries the upper and lowerbearings 14 and 15, in which is journaled the vertical shaft 16. Abevel-gear 17 is feathered upon this shaft 16 and intermeshes with thesmall bevel-gear 6 upon the shaft 4. The shaft 16 passes up through thebearing 18, which is adapted to swing upon this shaft as a pivot, itsinner end 19 resting upon the frame 11. A bolt 20, (see Fig. 10,) inengagement with the inner end 19,holds it down upon its seat and at thesame time permits it to swing upon its pivot, the head of the boltriding within a recess 2l in the bearing 14. Upon the upper end of shaft16 is'rigidly mounted the bevelgear 22. In a vertical extension 23 ofthe bearing 18 is journaled the shaft 24, and upon this shaft outside ofthe extension 23 is rigidly mounted the small bevel-gear 25, whichintermeshes with the bevel-gear 22 upon shaft 16. On the inner side ofthe extension 23 and integral with the shaft 24 is the open cylindricalsocket 26, in which the mandrel 27 is removablysecured by the bolt.28.The outer end ofthe shaft 24 is extended beyond the bevelgear 22, inorder that the mechanism may be set in motion by hand, if necessary.Upon the left-hand end of the frame is dovetailed A clutch IOO thevertical frame 29, which is adjusted up and down, as desired, by thescrew and attached hand-wheel 31. At the upper end of the frame 29 isthe bifurcated socket 32, adapted for the removable reception of theouter end of the mandrel 27, carrying the handle 33. The mandrel 27 isretained in this socket while being revolved by the holder 34, carryingthe handle 35. l This holder 34 is pivoted so as to swing in the upperportion of the bifurcated socket 32 and extends down across the front ofthe socket when in its lowest position to hold the mandrel. The mandrel27 is provided with a longitudinal concentric notch 36, (see Figs. 8 and9,) the end wall of the notch being formed into a radial shoulder 37.Upon ashelf 3S in frontof and below the mandrel are secured a series ofleaf-springs 39, which extend partially under the mandrel. The functionof these springs 39 is to guide and force the turned-over edge 40 of thesheetmetal strip 41 into engagementl with the notch i 36 in the mandrel,as clearly shown in Fig. S,

prior to the revolution of the mandrel.

The former against which the sheet-metal strip strikes and whichis heldagainst the mandrel during its revolution to give ita cylindrical shapeis shown at 42, and is provided with dovetailed projections 43, whichslide back and forth in sockets 44 in the frame as the former isreciprocated to "its two extreme positions, as shown in Figs. Sand 9.The means for reciprocating the former are arranged as follows:

45 is a rock-shaft (see Fig. 6) journaled across the frame below theformer 42. Upon this shaft is rigidly mounted a series of rocker arms46, extending upwardly and loosely engaging with the sockets 47 upon theunder side of the former. Underneath these rocker-arms and upon therock-shaft 45 are the segmental gears 4S, which intermesh with similarsegmental gears 49 upon a second rock-shaft 50, journaled across theframe be low the irst rock-shaft 45. An arm 51, rigid upon therock-shaft 50, has attached to it one end of a stiff coiled spring 52,the other end of which is secured to one of the standards of the frame.

53 is an arm rigidly secured to one end of the rock-shaft 50 and carriesat its outer end the friction-roller 54. A cam 55, surrrounding thevertical shaft 16, is adjustably secured to the bevel-gear 17 by thebolts 56, which pass through the curved slots 57 in the cam 55. rlhefriction-roller 54 is held by the force of the coiled spring 52 againstthe upper edge of the cam 55, which is provided on one side with thedepression 58. (Sec Fig. 11)

59 is an adjustable projection secured to the upper face of thebevel-gear 17 by the bolt 60 passing through the curved slot 61 of theprojection, and 62 is a rigid projection also se cured to bevel-gear 17.These .projections are adapted for engagement with theprojcction 63 uponthe clutch for releasing its engagement with the bevel-gear 6, as willbe more fully hereinafter explained.

The operation of my improved mechanism is as follows: The sheet-metalstrip 41, with its edges 40 and 64 turned in opposite directions, islaid upon the table 65, and the turnedover edge 40 forced between thesprings 39 and the mandrel 27 in the position shown in Fig. S, theshoulder 37 serving as a stop for the inserted edge of the sheet-metalstrip, which is, with the help of the springs 39, forced into engagementwith the concentric notch 36. the former 42 being in the position shownin Fig. 8. Power being applied by a belt to the pulley 5, the lever 8 ispulled over to the left, which effects an engagement of the clutch 7with the bevel-gear 6. This results, through intervening mechanismalready described, in causing the mandrel 27 to revolve, carrying theattached sheet-metal strip against the former 42, and as the mandrelcontinues to revolve the strip is thus forced against the same andcaused to assume a cylindrical form around the same, as clearly shown inFig. 9, the free edge of the strip overlapping theattached edge forabout a third of the circumference of the mandrel. As the cam 55revolves with the bevel-gear 17, the frictionroller 53 drops down theabrupt side G6 of the depression 58 of the cam, which has the effect ofturning the rock-shaft 50. The intermeshing-gears 43 and 49 cause thelevers 46 to be thrown over, carrying with them the former42 until itassumes the position shown in Fig. 9. The projection 59 then strikes theprojection 63 upon the clutch, releasing it and automatically stoppingthe operation of the mechanism. The pivotcd holder 34 is then thrown up,thus releasing the outer end of the mandrel, which can be swung out toremove there from the shaped sheet-metal strip. The mandril is thenreplaced and secured in its holder and the lever 8 is again pulled tothe left to throw the clutch 7 once more in engagement with thebevel-gear 6. As the bevel-gear 17 with its attached cam again revolvesit returns the mandrel to its former position ready for the nextsheet-metal strip. and as the frictionroller rides up theinclined side67 outof the depression 58 the former 42 is also thrown back to itsformer position adjacent to the mandrel. The rigid projection 62 nextstrikes the projection 63 upon the clutch, releasing it and againautomatically stopping the machine, which is now readyin all its partsto form the next sheet-metal strip. Different sizes of mandrels can beinterchangeably employed with my improved mechanism, theverticallyadjustable frames 11 and 29 being moved up or downcorrespondingly to the change in the di ameter of the mandrel employed,the adjustable projection 59 being also changed in position to properlyregulate the releasing of the clutch. Other forms of springs than thoseherein shown to guide the sheet-metal strip The machine is now ready foroperation,

l ting former for holding the sheet-.metal strip shaped, a formermovableto and from the mandrel for holding the sheet-metal strip against themandrel during its revolution and for releasing the same for removal andautomatic means for revolving the mandrel and reciprocating the former.

2. A machine for forming sheet-metal pipeblanks consisting ot' arevoluble notched mandrel around Which the sheet-metal strip is shaped,spring guides for directing the turned over edge of the sheet-metalstrip into engagement with the notched mandrel, a reciprocating formerfor holding the sheet-metal strip against the mandrel during itsrevolution and means for revolving the mandrel and reciprocating theformer.

3. A machine for forming sheet-metal pipeblanks consisting of a pivotedrevoluble notched mandrel around Which the sheet metal strip is shaped,a former movable to and from the mandrel for holding the sheetmetalstrip against the mandrel during its revolution and for releasing thesame for removal and automatic means for revolving the mandrel andreciprocating the former.

4. A machine for forming sheet-metal pipeblanks consisting of a pivotedrevoluble notched mandrel around which the sheetmetal strip is shaped,spring guides for directing the turned over edge of the sheet metalstrip into engagement with the notched mandrel, a reciprocating formerfor holding the sheet-metal strip against the mandrel during itsrevolution and means for revolving the mandrel and reciprocating theformer.

5. A machine for forming sheet-metal pipeblanks consisting of arevoluble notched mandrel around which the sheet metal strip is shaped areciprocating former for holding the sheet-metal strip against themandrel during its revolution and means for revolving the mandrel andreciprocating the former and automatically stopping the mechanism afterthe sheet metal strip has been shaped.

6. A machine for forming sheet-metal pipeblanks consisting of arevoluble notched mandrel around which the sheet-metal strip is shaped,spring guides for directing the turned over edge of the sheet-metalstrip into engage- Y ment With the'notched mandrel, a reciprocaagainstthe mandrel duringits revolution and meansfor revolving the mandrel andreciprocating the former and automatically stopping the mechanism afterthe sheet metal strip has been shaped.

7. A machine for forming sheet-metal pipeblanks consisting of a pivotedrevoluble notched mandrel around which the sheet metal strip is shaped,a reciprocating former for holding the sheet-metal strip against themandrel during its revolution and means for revolving the mandrel andreciprocating the former and automatically stopping the mechanism afterthe sheet metal strip has been shaped.

8. A machine for forming sheet-metal pipeblanks consisting of a pivotedrevoluble notched mandrel around which the sheetmetal strip isshaped,-spring guides for directing the turned over edge of the sheetmetal l strip into engagement With the notched mandrel, a reciprocatingformer for holding the sheet-metal strip against the mandrel andreciprocating the former, andv automatically stopping the mechanismafter the sheet-metal strip has been shaped.

9. A machine for forming sheet-metal pipeblanks consisting of arevoluble notched mandrel around which the sheet metal strip is shaped,a reciprocating former for holding the sheet-metal strip against themandrel during its revolution and means for revolving the mandrel andreciprocating the former and automatically stopping the mechanism afterthe sheet metal strip has been shaped and after the operative parts havebeen restored by power to their normal positions.

10. A machine for forming sheet-metal pipeblanks consisting of arevoluble notched mandrel around which the sheet-metal strip is shaped,spring guides for directing the turned over edge of the sheet-metalstrip into engagement with the notched mandrel, a reciprocating formerfor holding the sheet-metal strip against the mandrelduring itsrevolution and means for revolving the mandrel and reciprocating theformer and automatically stopping the mechanism after the sheet metalstrip has been shaped and after the operative part-s have been restoredby power to their normal positions.

1l. A machine for forming sheet-metal pipeblanks consisting of a pivotedrevoluble notched mandrel around which the sheet 'metal strip is shaped,a reciprocating former for holding the sheet-metal strip against themandrel during its revolution and means for revolving the mandrel andreciprocating the former and automatically stopping the mechanism afterthe sheet metal strip has been shaped, and after the operative partshave been restored by power to their normal positions.

l2 A machine for forming sheet-metal pipeblanks consisting of a pivotedrevoluble notched mandrel around Which the sheetmetal strip is shaped,spring guides for directing the turned over edge of the sheet metalstrip into engagement with the notched man-v drel, a reciprocatingformer for holding the ICO IIC

sheet-metal strip against the mandrel during In testimony whereof I havesigned my its revolution and means for revolving the name to thisspecication in the presence of mandrel and reciprocating the former andtwo subscribing Witnesses.

automatically stopping the mechanism after DANIEL H. STOLL. 5 thesheet-metal strip has been shaped and lVitnesses:

after the operative parts have been restored W. T. MILLER,

by power to their normalpositions. F. P. KERSTEN.

